哈拉哈塘油田自流注水技术先导试验

Pilot Tests for Gravity Water Injection in the Halahatang Oilfield

哈拉哈塘油田塔河南岸地区地面水资源极其匮乏,注水配套设施投资大,注水开发困难,严重影响开采速度和采收率。哈拉哈塘油田奥陶系油藏上部非目的层发育储量巨大的承压水层(石炭系东河砂岩、白垩系),可以直接作为自流注水水源。根据哈拉哈塘油田油水层发育特点,在借鉴国内外自流注水技术的基础上,研究开发了一套能应用于陆上油田的自流注水新技术,并在哈拉哈塘油田进行了先导试验,取得了一定的注水开发效果。该技术的成功应用可为陆上类似油田的注水开发提供一条新思路。

With sparse ground water resources in southern bank of the Tahe River in the Halahatang Oilfield, con- struction of water-injection facilities may involve heavy investment requirements and challenging water-injection operations. Such difficulties may present severe obstacles for promotion of production velocities and recovery ratios. Upper parts of the Odvicious reservoir formations in the Haiahatang Oilfield contain confined aquifers （ Devonian Donghe sandstone, Cretaceous ） with significant potentials in non-target formations. Water contained in such for- mations may be used directly as the source for gravity water injection. With consideration to specific features of oil/ gas ｜ayers in the Halahatang Oilfield and with consideration to available gravity water injection techniques around the world, an innovative gravity water injection technique suitable for on-shore oilfields has been developed. Pilot tests have been conducted in the Halahatang Oilfield with satisfactory water-flooding development performances a- chieved. Successful deployment of the technique may provide new ways for development of similar on-shore oilfields through water flooding.